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Trump responded by making a joke about exercise equipment that injured Reid

Washington (CNN)Harry Reid fired back against Donald Trump on Friday, as the two political opponents continue their war of words.

The Senate Minority Leader, a former boxer, often serves as his party's attack dog, and he has pulled no punches when going after the Republican presidential nominee.

"You can't believe anything he says," Reid told CNN's Manu Raju in an interview on Friday directly after Trump said President Barack Obama.

"He is one of the most unbelievably immoral people I've ever heard deal with politics. Here's a man who attacks people of color, women, people's sexual identity, people who are handicapped, I mean what kind of a man would do this?"

Earlier Friday, the Nevada Democrat responded to a slight from the GOP nominee about an exercise accident that blinded Reid in one eye.

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"Trump can make fun of the injury that took sight in my eye -- I've dealt with tougher opponents. With my good eye, I see Trump is a con-artist," Reid tweeted.

Trump can make fun of the injury that took sight in my eye-I've dealt with tougher opponents. With my good eye, I see Trump is a con-artist.

On Thursday, Reid excoriated Trump from the Senate floor, calling him a "spoiled brat," "a con artist" and a "human leech who will bleed the country."

Trump responded to the "slim and trim" comment in an interview with The Washington Post, published Thursday but conducted Wednesday.

"Harry Reid? I think he should go back and start working out again with his rubber work-out pieces," Trump said, referring to an exercise band that snapped, causing Reid a serious facial injury that impaired his sight.